NiTi Alloy

# C.Wire (Controlled Memory)

C.Wire is Micro-Mega's controlled-memory NiTi alloy, sharing the fundamental thermal processing philosophy of CM-Wire but formulated specifically for their file systems. Like CM-Wire, C.Wire dramatically reduces shape-memory behavior, allowing files to be bent by hand and retain the curve for pre-placement adaptation to the canal. The alloy provides significantly improved cyclic fatigue resistance compared to austenitic NiTi, enabling single-file rotary workflows in curved anatomy. C.Wire files can be pre-bent without risk of the instrument springing back, and they passively follow the canal path after shaping without exerting restoring forces.

## Metallurgical Properties

Af Temperature~45–55°C

Phase at 37°CMartensite (low shape memory)

FlexibilityVery High (pre-bendable)

Cyclic FatigueSignificantly improved vs austenitic

[Compare all heat treatments→](https://endo-guide.app/alloy/heat-treatment-comparison)

## Systems Using C.Wire (Controlled Memory)

[### One Curve Micro-Mega (COLTENE) Rotary C.Wire · 6% · 4 files Single-File Simplicity](https://endo-guide.app/system/one-curve)[### One RECI Micro-Mega (COLTENE) Reciprocating C.Wire · 4% · 5 files Single-File Reciprocating Shaping](https://endo-guide.app/system/one-reci)

## Related Clinical Links

NiTi collections

[Controlled-Memory Files](https://endo-guide.app/niti-files/controlled-memory-files)[Reciprocating Systems](https://endo-guide.app/niti-files/reciprocating-file-systems)[Rotary Systems](https://endo-guide.app/niti-files/rotary-file-systems)[Single-Use Systems](https://endo-guide.app/niti-files/single-use-niti-files)

Clinical use cases

[Severe Curvature](https://endo-guide.app/use-case/severe-curvature)

Related alloys

[Gold Heat Treatment](https://endo-guide.app/alloy/gold)[Blue Heat Treatment](https://endo-guide.app/alloy/blue)[CM-Wire (Controlled Memory)](https://endo-guide.app/alloy/cm-wire)[EDM Process (Electrical Discharge Machining)](https://endo-guide.app/alloy/edm)

![Uzm. Dt. Levent Yüksel](https://endo-guide.app/images/levent-yuksel.jpg)

Reviewed by

Uzm. Dt. Levent Yüksel

DDS · Endodontist

Endodontist — DDS, Hacettepe University; endodontics specialty training, Ankara University. 10+ years of clinical experience. Sole author and reviewer of EndoGuide content.

[About the author](https://endo-guide.app/about)[Editorial policy](https://endo-guide.app/editorial-policy)[Clinical profile](https://drleventyuksel.com/)

[Back to all systems](https://endo-guide.app/)

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